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- [22] ASYMPTOTIC-DISTRIBUTION OF THE EIGENVALUES OF SCHRODINGER TYPE OPERATORS COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1981, 292 (06): : 359 - 361
- [23] ASYMPTOTIC DISTRIBUTION OF EIGENVALUES FOR DIFFERENTIAL OPERATORS WITH CONSTANT COEFFICIENTS DOKLADY AKADEMII NAUK SSSR, 1970, 195 (03): : 570 - &
- [26] ASYMPTOTIC-BEHAVIOR OF EIGENVALUES FOR A CLASS OF DEGENERATED ELLIPTIC OPERATORS (DIMENSION 2) COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1974, 278 (26): : 1619 - 1622
- [30] ON THE ASYMPTOTIC-DISTRIBUTION OF THE EIGENVALUES OF PSEUDODIFFERENTIAL-OPERATORS IN RN ARKIV FOR MATEMATIK, 1979, 17 (02): : 297 - 313